00:01
In this problem we had a collar here sliding on a track.
00:06
It is straight in these regions, and then it's a circular arc in these regions.
00:14
I've drawn it fairly poorly.
00:16
It's in three dimensions, and then there is a spring connected to the collar that's attached to a point above the track.
00:26
So, we know, we're given that the under, the unstretched length of the spring, spring is 300 millimeters, the spring constant is 150 newtons per meter, and the collar weighs 0 .75 kilograms.
00:41
We've defined a few points on here.
00:44
This is f here.
00:47
So that is, and i'm using this as my origin here.
00:52
So f is 350 millimeters above the origin.
00:57
A, where the collar is initially, is 400 millimeters, to the right of the origin and 400 millimeters down from the origin, i guess if you want to call it, and 500 millimeters to the right.
01:22
So we just use conservation of energy here...